Search for dissertations about: "asexual reproduction"
Showing result 6 - 10 of 13 swedish dissertations containing the words asexual reproduction.
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6. How sexual reproduction affects the population biology of Phytophthora infestans
Abstract : Phytophthora infestans is a rapidly evolving and highly adaptable pathogen. It is the cause of late blight, one of the most devastating diseases in potato production. Depending on whether both mating types are present or not, P. infestans can undergo both asexual and sexual reproduction. READ MORE
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7. On the endemic Fucus radicans in the Baltic Sea
Abstract : The brown macroalgae Fucus radicans is endemic to the Baltic Sea, but little is known about this newly described species. This thesis investigates the ecology and role of F. radicans within the species poor Baltic Sea ecosystem. The thallus of F. READ MORE
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8. Evolution of asexuality in insects : Polyploidy, hybridization and geographical parthenogenesis
Abstract : Asexual reproduction and polyploidy are relatively rare in animals with chromosomal sex determination and always represent a derived condition. To accomplish asexual reproduction several changes in gene expression are required in the mechanism of oogenesis. READ MORE
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9. Genetic Disequilibria and the Interpretation of Population Genetic Structure in Daphnia
Abstract : Understanding the processes that shape the spatial distribution of genetic variation within species is central to the evolutionary study of diversification and demography. Neutral genetic variation reflects past demographic events as well as current demographic characteristics of populations, and the correct interpretation of genetic data requires that the relative impact of these forces can be identified. READ MORE
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10. On the evolutionary effects of linkage and deleterious mutations in small populations
Abstract : The aim of this thesis is to evaluate the effect of deleterious mutations and linkage on variation in neutral markers and fitness in small populations. The study is based on two main approaches, one by using computer simulations, the other by exploring genetic variation in a cyclical parthenogen, Daphnia pulex (Crustacea: Cladocera). READ MORE